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Derivative Financial Instruments (Schedule Of Open Oil Derivative Positions) (Details)	9 Months Ended
	Sep. 30, 2020 $ / bbl bbl
NYMEX West Texas Intermediate Price Swaps Oil Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	88,000
Weighted Average Price Swap	36.28
NYMEX West Texas Intermediate Price Swaps Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	23,810
Weighted Average Price Swap	35.79
NYMEX West Texas Intermediate Price Swaps Oil Q1 2022 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	500
Weighted Average Price Swap	45.00
NYMEX West Texas Intermediate Price Collars Oil Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	39,500
Weighted Average Floor Price	50.93
Weighted Average Ceiling Price	60.93
NYMEX West Texas Intermediate Price Collars Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	19,367
Weighted Average Floor Price	40.66
Weighted Average Ceiling Price	50.66
NYMEX West Texas Intermediate Price Collars Oil 2022 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	6,750
Weighted Average Floor Price	37.93
Weighted Average Ceiling Price	47.93
Argus MEH Basis Swaps Oil Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	50,000
Weighted Average Differential To WTI	0.47
Midland Sweet Basis Swaps Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	7,000
Weighted Average Differential To WTI	1.27
Midland Sweet Basis Swaps Oil Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	32,000
Weighted Average Differential To WTI	(1.23)
NYMEX Roll Basis Swaps Oil Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	54,000
Weighted Average Differential To WTI	0.38

X

- Definition

Weighted average differential to W T I.

+ References

No definition available.

+ Details

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X

- Definition

The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

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X

- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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X

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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- Details

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